>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #2900624. --> Reported by: [berdir](https://www.drupal.org/user/214652) >>> <p>This works as long as you don't add other classes, but when you e.g. try to merge it with custom link attributes in the menu template, then the class is lost as the recursive array merge drops the string.</p>